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拨 号 线 : 24 phrases in 10 subjects |
| Agriculture | 2 |
| Communications | 1 |
| Electronics | 9 |
| Information technology | 3 |
| Management | 1 |
| Multimedia | 1 |
| Scientific | 1 |
| Space | 1 |
| Technology | 1 |
| Telecommunications | 4 |
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